<template>
  <div id="list">
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!--
            数据类型一定要和取出的json中的一致，否则没法回填
            因此，这里value使用动态绑定的值，保证其数据类型是number
          -->
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像：TODO -->
      <el-form-item label="讲师头像">

        <!-- 头衔缩略图 -->
        <pan-thumb :image="teacher.avatar"/>
        <!-- 文件上传按钮 -->
        <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
        </el-button>

        <!--
            v-show：是否显示上传组件
            :key：类似于id，如果一个页面多个图片上传控件，可以做区分
            :url：后台上传的url地址
            @close：关闭上传组件
            @crop-upload-success：上传成功后的回调
         -->
        <image-cropper
          v-show="imagecropperShow"
          :width="300"
          :height="300"
          :key="imagecropperKey"
          :url="BASE_API+'/oss/fileOss/upload'"
          field="file"
          @close="close"
          @crop-upload-success="cropSuccess"/>

      </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdateTeacher">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import teacherApi from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'
export default {
  components: { ImageCropper, PanThumb },
  data() {
    return {
      teacher: {
        name: '',
        sort: 0,
        level: 1,
        career: '',
        intro: '',
        avatar: 'https://edu-guli-cong.oss-cn-hangzhou.aliyuncs.com/2022/11/24/880a0bb2cb6b491b8c560feac93272effile.png'
      },
      saveBtnDisabled: false,
      imagecropperShow: false,
      imagecropperKey: 0,
      BASE_API: process.env.BASE_API
    }
  },

  watch: {
    // 路由变化
    $route(to, from) {
      this.init()
    }
  },

  created() {
    this.init()
  },

  methods: {
    init() {
      if (this.$route.params && this.$route.params.id) {
        const id = this.$route.params.id
        teacherApi.getTeacherById(id).then(res => {
          this.teacher = res.data.teacher
        })
      } else {
        this.teacher = {}
      }
    },

    saveOrUpdateTeacher() {
      if (this.teacher.id) {
        this.updateTeacher()
      } else {
        this.saveTeacher()
      }
    },

    saveTeacher() {
      teacherApi.addTeacher(this.teacher).then(res => {
        this.$message({
          type: 'success',
          message: '添加成功!'
        })
        this.$router.push({ path: '/teacher/list' })
      })
    },

    updateTeacher() {
      teacherApi.updateTeacher(this.teacher).then(res => {
        this.$message({
          type: 'success',
          message: '修改成功!'
        })
        this.$router.push({ path: '/teacher/table' })
      })
    },

    // 关闭上传弹窗
    close() {
      this.imagecropperShow = false
    },

    // 上传成功
    cropSuccess(data) {
      this.teacher.avatar = data.url
      this.close()
      this.imagecropperKey = this.imagecropperKey + 1
    }
  }
}
</script>

<style>

</style>
